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Full Discussion: grep to get line numbers
Top Forums UNIX for Dummies Questions & Answers grep to get line numbers Post 302514081 by alindner on Thursday 14th of April 2011 06:50:34 PM
Old 04-14-2011
grep to get line numbers
I know if i use grep -n that the output will have the lines numbered but is there a way to grep the actually line number.

so like this
Code:
grep -n "one" /usr/dict/numbers
1:one
21:twenty-one
31:thirty-one
41:forty-one
51:fifty-one
61:sixty-one
71:seventy-one
81:eighty-one
91:ninety-one

but using grep to actually work with the line numbers. So if i wanted to use grep for only even line numbers, or line numbers that are any number followed by 1.

---------- Post updated at 06:50 PM ---------- Previous update was at 06:48 PM ----------

Can i use delimiters or fields with grep/egrep?

So like when using

Code:
cut -d ":" -f1

 

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LEARN ABOUT POSIX

zgrep

ZGREP(1)						      General Commands Manual							  ZGREP(1)

NAME

       zgrep - search possibly compressed files for a regular expression

SYNOPSIS

       zgrep [ grep_options ] [ -e ] pattern filename...

DESCRIPTION

       Zgrep  invokes  grep  on  compressed  or  gzipped  files.   These  grep	options  will  cause  zgrep  to  terminate  with  an  error  code:
       (-[drRzZ]|--di*|--exc*|--inc*|--rec*|--nu*).  All other options specified are passed directly to grep.  If no file is specified,  then  the
       standard input is decompressed if necessary and fed to grep.  Otherwise the given files are uncompressed if necessary and fed to grep.

       If the GREP environment variable is set, zgrep uses it as the grep program to be invoked.

EXIT CODE

       2 - An option that is not supported was specified.

AUTHOR

       Charles Levert (charles@comm.polymtl.ca)

SEE ALSO

       grep(1), gzexe(1), gzip(1), zdiff(1), zforce(1), zmore(1), znew(1)

																	  ZGREP(1)
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